Red Glow

Night Shift warms your screen. Red Glow goes all the way.

A tiny menu bar app that bathes every display in a deep, calm red glow, so your eyes can rest and your melatonin can do its job. Two sliders. One toggle. Zero dock clutter.

WHY RED, NOT JUST WARM
Blue light suppresses melatonin for about twice as long as green light. Red sits at the far end of the visible spectrum and is the least disruptive to your circadian rhythm. Night Shift only nudges the color temperature warmer. Red Glow takes it all the way to red, the way f.lux loyalists and biohackers have wanted for years.

PERFECT FOR
- Late night work without wrecking your sleep
- Reading in bed next to a partner
- Astronomy and stargazing (preserves dark-adapted vision)
- Photography darkroom workflows
- Anyone who finds Night Shift too timid

MULTI MONITOR, DONE RIGHT
Plug in a second screen, a third, a 5K reference display. Red Glow tints them all at once, in sync. Pull the brightness slider down and every display dims together, no fiddling with each monitor's hardware buttons. Unplug a screen mid-session and the tint snaps back the moment you plug something new in.

LIVES IN YOUR MENU BAR
No dock icon. No window in the way. Click the menu bar item, get a tiny popover with a toggle, an intensity slider, a brightness slider, and a wink of a caption that reacts to where you drag. Click away, it disappears.

REMEMBERS YOU
Quit and reopen, your settings come back exactly where you left them. Quit for good and your displays return to normal gamma instantly. Nothing lingers.

HOW IT WORKS
Red Glow uses CoreGraphics gamma adjustments at the system level. No overlay window stealing clicks, no compositor hack, no screen recording permission, no kernel extension. Just the same low-level display API that Night Shift itself rides on, pointed at a redder destination.

PRIVACY
Red Glow does not collect, transmit, or sell any data. Ever. Your settings live in your own user defaults, on your own Mac. The app does not need network access and does not ask for it.

REQUIREMENTS
- macOS 13.0 or later
- Works on Apple Silicon and Intel Macs
- One time purchase, no subscription, no ads

Built by Pixelsorter for people who want their screens to shut up at night.